in a statement, jackson says she's leaving the epa, quote, confident the ship is sailing in the right direction. >>> russian president vladimir putin has indicated he will sign a bill that bars the adoption of russian children by u.s. families. he said he'll first study the final text of the bill, but says he sees no reason not to sign it. the law is a big deal for many american. nearly a thousand russian children were adopted here in just the last year alone. the move is largely seen as retaliation for a law president obama signed that restricts russian human rights abusers from traveling to the u.s. >>> our fourth story "outfront" tonight, arming our school principals. a proposal by arizona attorney general tom horn to give guns to school principals is gaining some support. horn says school shootings like the one in newtown, county, could be prevented if a school employee were armed and trained to use a gun. at least 36 investigators and three sheriffs are now backing the proposal, including sheriff paul babu of arizona, who's written, "the nra is correct. we need a cop in every sch